Bed and cylinder printing press



July 30, 1935. c. B. coTT-RELL, 3D

BED AND CYLINDER PRINTING PRESS 2 Sheets-sheet 1 Filed May ll', 1933Null' Il I. I. Il Il I. 4I.. I. l. I4 I. a. mm

INVENTOR dn/,vf Wi*- ATroRNEYS July 30, 1935. c. B. COTTRELL, 3D

BED AND CYLINDER PRINTING PRESS Filed May l1, 1955 2 Sheets-Sheet 2 v[NVENTR ATTORNEYS Patented July 30, 1935 UNITED STATES 2,009,687 BED ANDCYLINDER PRINTING yrREss Y Calvert B.' Cottrell, 3d,

Westerly, R. I., assignor to C. B. Cottrell & Sons'Cornpany, Westerly,R. I., a corporation of Delaware Application May 11, 193s, Ystraling.670,408

V16` Claims.

My invention is directed, broadly, to a novel electrically controlledmeans for respectively bringing the bed and cylinder into and out ofprinting coaction for the printing and non-Y 15 printing strokes of thebed.

My invention is `also directed to means for preventing the bringing-ofthe bed and cylinder into printing coaction should a sheet fail to befed.

My invention, more particularly,A comprises a lever, as a toggle lever,for controlling the oper ation of the impression cylinder, said leverbeing provided With an armature which is moved in one direction by theenergization of one electromagnet, to bring the cylinder down intoprinting co action With the bed for the printing stroke cf the bed, andwhich is moved in the opposite direction by the deenergization of saidelectromagnet and the energization of another electromagnet, to causethe lever to permit the impression cylinder to be raised out of itsprinting coaction with the bed for the non-printing ystroke of the bed;said first named electromagnet being under the control of the relay ,ofa photoelectric Aunitrvvhereby the electromagnet will be deenergizedupon the failure of a sheet to be fed, thus preventing the bringing ofthe impression cylinder down into printing coaction with the bed.

I have chosen to illustrate my Vinvention in connection with the bed andcylinder printing press which forms the subject matter of my copendingapplication filed February 2, 1933, Serial No. 654,855, and also inconnection with the sheet registering device which forms the subjectmatter of my copending application led Deceniber 17, 1932, Serial No.647,714 now Letters Patent 1,951,901, dated March 20, 1934. l

A practical embodiment of my invention is represented in theaccompanying drawings, in which Figure l represents my improved bed and40 cylinder printing press in side elevation, the parts being shown infullr lines in the positions they assume as a sheet is about to be takenfrom the feeder by the form bed grippers on the printing stroke of thebed, and in dotted lines in the positions they assume as the bed reachesthe end of its printing stroke, or upon the failure of a sheet to befed, and Figure 2 is a complete vWiring diagram of the embodiment hereinrepresented in Figure l.

The oscillating impression cylinder isdenoted by I and its set ofgrippers by 2. The reciprocating bed is denoted .by 3 and its. form byIl. The sheet feeder, denoted by 5, is provided with Ythe usual sheetstop B, said feeder being located at one side of the impression cylinderI. The

delivery which islocated at the other side of the impression cylinderincludes, in the present instance, a rotary Vsheet carrier 'I providedWith a set of grippers S arranged to take the printed sheets from thegrippers 2 of the impression cylinderand to deliver Vthe sheets at thetop of the rotarycarrier to the coacting endless tape vcar riers 9, I0.

, The reciprocating form bed 3 is provided with a set of tumbler,actuated grippers II which operate on the printing stroke of the bed, totake the sheets from the feeder 5 after they have been registered and totransfer the sheets to the impression cylinder grippers 2 at the bottomof the cylinder as shown, described and claimed in my said copendingapplication filed February 2, 1983, Serial No. 654,855.

The several grippers may be operated in any well known .or approvedmanner at theproper times and their 'operating means are not shown andwill not be specically described herein.

Means are provided for normally lifting the impression cylinder awayfrom its printing Vco-y action With the form bed, said means in thepresent instance comprising ,expansion springs I2. vElectricallycontrolled means Aare provided for bringing theimpression cylinder idown into its printing coaction with the form bed 3 Von the printingstroke of the bed, providing a sheet has been fed from the feeder to thebed grippers II. The said means in the present instance comprises anelectromagnet I 3 arranged,r when energized, .to move the armature I4 ina direction to close a toggle lever, one arm I5 of which is pivoted at YI5 to the press frame and the other arm II of which is pivoted at i8 tothe cross head i9 of the cylinder lifting bars 2c. An oppositelydisposed electromagnet ZI is arranged, when energized, (if theelectromagnet i3 be deenergized) to move the armature Ill in a directionto open the toggle lever and thus permitthe springs I2 to raise theimpression cylinder I. 1

The eleotromagnet i3 is connected bya Wire 22 to a source of electriccurrent supply, notshown herein. The electromagnet is also', `connected.through the wires 23 and 24, throiurh fa circuit maker and breaker 29which, in the present instance, is a normally open switch arranged inpo-Y sition to be closed to energize the electromagnet I3 as the formbed reaches the end of. its nonprinting stroke. I I. I

The electromagnet 2i is connected throughV a Wire 28 to a source ofelectric current supply, vnot shown herein, and it is also connected kbythe vrres. 2J, 28, through a circuit maker and breaker Gil 25, in thepresent instance a normally open switch which is closed as the form bedreaches the endof its printing stroke, to energize the saidelectromagnet 2|.

The electromagnet I3 is also under the control of a light responsivedevice, as a photoelectric unit, which is in turn controlled by theregistry of the sheet on the feeder, as is clearly shown in my saidLetters Patent 1,951,901. This photoelectric unit is connected, throughthe circuit line 39, to the side guide 4) of the sheet registeringdevice, the operation of which is fully explained in my said LettersPatent 1,951,901. This photoelectric unit comprises, generally, thefollowing elements: The photoelectric tube 3B is electrically connectedto the photoelectric relay 3i of any well known or approved form. Thisphotoelectric tube 30 is positioned beneath the feed table 5 in the pathof a beam of light projected from the lamp 32. This relay SI iselectrically connected to the electromagnet I3 through the circuit wire24, switch 29 and wire 23 and also to a source of electric currentsupply, not shown herein, by wire 33.

This relay 3I vis 'also electrically connecte through the circuit wire38 to a source of electric current supply, not shown herein.

In operation: When a sheet has been side registered by cutting oir thebeam or light from the lamp 32 of the photoelectric unit, the closing ofthe contactor switch 4I completes the circuit through the circuit wire24, switch 29 and circuit wire 23 to cause the energization of themagnet I3, the deenergization of the electromagnet 2| having beenaccomplished by the disengagement of the lug 35 with 'the switch arm 3lof the crcuit maker and breaker 25. The energiz'ation of theelectromagnet I3 and the deenergization of the electromagnet 2| willcause the electromagnet I3 to move the armature IQ in a direction toclose the toggle lever and thus bring the impression cylinder I downinto position to coact with the form bed 3 on the printing stroke of thebed. If, however, no sheet is fed, the relay 3l will remain open and theelectromagnet I3 willremain deenergized, thus permitting the springs I2to hold the impression cylinder -l out of its printing coaction with theform bed.

, After the sheet has been printed and the bed has reached the end ofits printing stroke the lug 35 will engage the arm 31 of the circuitmaker and breaker 25, thus closing the circuit through the electromagnet2I and energizing the saine. In the meantime, the lug 35 on the printingstroke of the bed has permitted the arm 33 to swing back into positionto open the circuit maker and breaker 29. Therefore, as theelectromagnet I3 is deenergized the energized electromagnet 2| willswing the armature I4 in a direction to open the toggle lever and thuspermit the springs I2 to lift the impression cylinder I out of itsprinting coaction with the bed on the non-printing stroke of the bed.

It is evident that various changes may be resorted to in theconstruction, form and arrangement of the several parts withoutdeparting from the spirit and scope of my invention, and hence I do notwish to be limited to the particular embodiment herein shown anddescribed, but

What I claim is:

1. In a bed and cylinder printing' press, an impression cylinder, areciprocating form bed, means normally separating the bed and cylinder,and electric means controlled by the bed for causing the bed andcylinder to be brought into and out of printing coaction on the printingand nonprinting strokes respectively of the bed.

2. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally separating the bed and cylinder,electric means controlled by the bed for causing the bed and cylinder tobe brought into and out of printing coaction on the printing andnonprinting strokes respectively of the bed, and a sheet controlledlight responsive device for preventing the bringing of the bed andcylinder into printing coaction upon the failure of a sheet to be fed.

3. In a bed and cylinder printing press, an irnpression cylinder, areciprocating form bed, means normally separating the bed and cylinder,and electric means controlled by the bed for causing the bed andcylinder to be brought into and out of printing coaction on the printingyand non-printing strokes respectively oi the bed, said electric meansincluding a toggle lever bearing an armature and oppositely disposedelectromagnets for opening and closing the toggle lever.

4. Inra bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally separating the bed and cylinder,electric means controlled by the bed for causing the bed'and cylinder tobe brought into and out of printing coaction on the printing andnonprinting strokes respectively of th-e bed, said electric meansincluding a toggle bearing an armature and oppositely disposedelectromagnets for opening and closing the toggle lever, and a sheetcontrolled light responsive device for preventing the energization ofthe toggle lever opening electromagnet upon the failure of a sheet to befed.

5. In a bed and cylinder printing press, an irnpression cylinder, areciprocating form bed, means normally separating the bed and cylinder,a toggle lever controlling the relative movements of the bed andcylinder, an'armature carried by the toggle lever, and bed controlledelectromagnets disposed upon opposite sides oi the armature for movingthe armature to open and close the toggle lever for causing the bed andcylinder to be brought into and out of printing coaction on the printingand non-printing strokes respectively of the bed.

6. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means norm-ally separating the bed and cylinder,a toggle lever controlling the relative movements of the bed andcylinder, an armature carried by the toggle lever, bed controlledelectromagnets disposed upon opposite sides of the armature for Ymovingthe armature to open and close the toggle lever for causing the bed andcylinder to be brought into and out of printing coaction on the printingand non-printing strokes respec tively of the bed, and a sheetcontrolled light responsive device in circuit with the toggle leverclosing electromagnet for preventing the energization of theelectromagnet upon the failure of a sheet to be fed.

7. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally separating the bed and cylinder;a toggle lever controlling the relative movements of the bed andcylinder, an armature carried by the toggle lever, electromagnetsdisposed upon opposite sides of the armature, and circuit makers andbreakers for the electromagnets, oper ated by the bed at the ends of itsstrokes,.for causing the electromagnets to move the armature to open andclose the toggle lever to cause the bed and cylinder to be brought intoand out of printing coaction on the printing and nonprinting strokesrespectively of the bed.

8. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally separating the bed and cylinder,a toggle lever controlling the relative movements of the bed andcylinder, an armature carried by the toggle lever, electromagnetsdisposed upon opposite sides of the armature, circuit makers andbreakers for the electromagnets, operated by the bed at the ends of itsstrokes, fo-r causing the electromagnets to move the armature to openand close the toggle lever to cause the bed and cylinder to be broughtinto and out of printing coaction on the printing and ncn-printingstrokes respectively of the bed, and a sheet controlled light responsivedevice in circuit with the toggle lever closing electromagnet forprevent ing the energization of the electromagnet upon the failure of asheet to be fed.

9. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, and electric means controlled by the bed for causing the cylinderto be moved into and out oi printingcoaction with the bed on theprinting and non-printing strokes respectively oi' the bed.

i0. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, electric means controlled by the bed for causing the cylinder to bemoved into and out of printing coaction with the bed on the printing andnon-printing strokes respectively oi the bed, and a sheet controlledlight responsive device for preventing the bringing of the cylinder downinto its printing coaction with the bed upon the failure of 'a sheet tobe fed.

ll. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally liftinrr the cylinder from thebed, and electric means controlled by the bed for causing the cylinderto be moved into and out of printing coaction with the bed on theprinting and non-printing strokes respectively of the bed, said electricmeans including a toggle lever bearing an armature and oppositelydisposed electromagnets for opening and closing the toggle lever l2. Ina bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, electric means controlled by the bed for causing the cylinder to bemoved into and out of printing coaction with the bed on the printing andnon-printing strokes respectively of the bed, said electric meansincluding a toggle lever bearing an armature and oppositely disposedelectromagnets for opening and closing the toggle lever, and a sheetcontrolled light responsive device for preventing the energization ofthe toggle lever opening electromagnet upon the failure of a sheet to befed.

13. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed,

means normally lifting the cylinder from the bed, a toggle levercontrolling the movement of the cylinder toward and away from the bed,an armature carried by the toggle lever, and bed controlledelectromagnets disposed upon opposite sides of the armature for movingthe armature to open and close the toggle lever for causing the cylinderto be brought into and out of printing coaction with the bed on theprinting and nonprinting strokes respectively of the bed.

14. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, a toggle lever controlling the movement of the cylinder toward andaway from the bed, an armature carried by the toggle lever, bedcontrolled' electromagnets disposed upon opposite sides of the armaturefor moving the armature to open.

and close the toggle lever for causing the cylinder to be brought intoand out of printing coaction with the bed on the printing andnon-printing strokes respectively of the bed, and a sheet controlledlight responsive device in circuit with the toggle lever closingelectromagnet for preventing the energization of the electromagnet uponthe failure of a sheet to be fed.

l5. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, a toggle lever controlling the movement of the cylinder towardl andaway from the bed, an armature carried by the toggle lever,elcctromagnets disposed upon opposite sides of the armature, and circuitmakersand breakers for the electromagnets, operated by the bed at theends of its movements for causing the electromagnets to move thearmature to open and close the toggle lever to cause the cylinder to bebrought into and out oi printing coaction with the bed on the printingand non-printing strokes respectively of the bed.

16. In a bed and cylinder printing press, an impression cylinder, areciprocating form bed, means normally lifting the cylinder from thebed, a toggle lever controlling the movement of the cylinder toward andaway from the bed, an armature carried by the toggle lever, electromagnets disposed upon opposite sides of the armature, circuit makers andbreakers for the electromagnets operated by the bed at the ends of itsmovements for causing the electromagnets to move the armature to openand close the toggle lever to cause the cylinder to be brought into andout of printing coaction with the bed on the printing and non-printingstrokes respectively of the bed and a sheet controlled light responsivedevice in circuit with the toggle lever opening electromagnet forpreventing the energization of the electromagnet upon the failure of asheet to be fed. l

CALVERT B. COTTRELL, 3RD.

